Implement code source from path on disk

Author: UnsignedArduino

examples/Racers.yaml

@@ -19,19 +19,19 @@ project:
   title: "{NAME} v{VERSION}"
 
 inputs:
+  # Can be share_link, github, or path
   code:
-    # Can be share_link, github, or path
     type: share_link
     value: https://arcade.makecode.com/84426-33815-03715-00484
 
-  #  code:
-  #    type: github
-  #    value: https://github.com/UnsignedArduino/Racers
-  #    checkout: master
+#  code:
+#    type: github
+#    value: https://github.com/UnsignedArduino/Racers
+#    checkout: master
 
-  #  code:
-  #    type: path
-  #    value: "E:/Racers"
+#  code:
+#    type: path
+#    value: "E:/Racers"
 
   assets:
     # Icon is optional but highly recommended, it will be used as the favicon

src/mkcd2app/build_project/inputs/code.py

@@ -18,6 +18,7 @@
     UrlAssetSource,
 )
 from mkcd2app.utils.logger import create_logger
+from mkcd2app.utils.paths import rmtree_robust
 from mkcd2app.utils.run import run_cmd
 
 logger = create_logger(name=__name__, level=logging.INFO)
@@ -43,10 +44,9 @@ def fetch_code(config_yaml: str, node_modules_for_mkc: ContentDir) -> ContentDir
     # Clean previous output, not wasteful because redun already checks our inputs
     # and outputs to see if they changed
     if code_path.exists():
-        shutil.rmtree(code_path)
+        rmtree_robust(code_path)
 
     # TODO: Implement source code download from GitHub
-    # TODO: Implement source code copy
     match config.inputs.code.root:
         case ShareLinkCodeSource(value=url):
             logger.debug(f"Downloading source code from {url}")
@@ -55,8 +55,10 @@ def fetch_code(config_yaml: str, node_modules_for_mkc: ContentDir) -> ContentDir
             run_cmd(["npx", "mkc", "download", str(url)], cwd=code_path)
         case GitHubCodeSource(value=url, checkout=checkout_target):
             logger.debug(f"Downloading source code from {url}@{checkout_target}")
+            raise NotImplementedError("GitHub code source not implemented yet")
         case PathCodeSource(value=path):
             logger.debug(f"Copying source code from {path}")
+            shutil.copytree(path, code_path)
 
     logger.debug("Source code downloaded")
     return ContentDir(str(code_path))

src/mkcd2app/utils/paths.py

@@ -0,0 +1,27 @@
+import os
+import shutil
+import stat
+from pathlib import Path
+from types import TracebackType
+from typing import Any
+
+
+def _remove_readonly(
+    func: Any,
+    path: str,
+    exc_info: tuple[type[BaseException], BaseException, TracebackType],
+) -> None:
+    """shutil.rmtree error handler: clear read-only bit and retry.
+
+    Needed on Windows because git marks files under .git/objects (and
+    sometimes .git itself) read-only, which makes os.unlink/os.rmdir
+    raise PermissionError (WinError 5) even though we own the files.
+    """
+    os.chmod(path, stat.S_IWRITE)
+    func(path)
+
+
+def rmtree_robust(path: Path) -> None:
+    if not path.exists():
+        return
+    shutil.rmtree(path, onerror=_remove_readonly)